Iranian-backed hackers have continued a three-year cyberespionage campaign focused against U.S. officials, in an effort to steal data and learn more about political issues, according to iSight Partners. In addition to the United States, these Iranian cyberattackers also targeted the U.K., Syria, Iraq and Saudi Arabia, using social engineering to compromise users.

Security experts have noticed Iran focusing more on cyberattacks, especially trying to target infrastructure and military institutions. In this attack, hackers use social media and pose as U.S.-based media to trick users into providing personal data, according to the study.

"It is such a complex and broad-reaching, long-term espionage campaign for the Iranians," noted Tiffany Jones, iSight Senior VP, in a statement. "What they lack in technical sophistication, they make up in creativity and persistence."